US8142161B2 - Replaceable staking insert - Google Patents

Replaceable staking insert Download PDF

Info

Publication number
US8142161B2
US8142161B2 US11/858,186 US85818607A US8142161B2 US 8142161 B2 US8142161 B2 US 8142161B2 US 85818607 A US85818607 A US 85818607A US 8142161 B2 US8142161 B2 US 8142161B2
Authority
US
United States
Prior art keywords
staking
insert
assembly
wheel
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US11/858,186
Other languages
English (en)
Other versions
US20090077795A1 (en
Inventor
Stephen Robert Prince
Stephen Paul Wassynger
Thomas R. Tipton
Tushar S. Desai
Michael E. Friedman
Christopher Robert Kelly
James Purdue Masso
Paul L. Kalmar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Infrastructure Technology LLC
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TIPTON, THOMAS R., DESAI, TUSHAR S., FREIDMAN, MICHAEL E., KALMAR, PAUL L., KELLY, CHRISTOPHER ROBERT, MASSO, JAMES P., PRINCE, STEPHEN ROBERT, WASSYNGER, STEPHEN PAUL
Priority to US11/858,186 priority Critical patent/US8142161B2/en
Priority to CH01472/08A priority patent/CH697913B8/de
Priority to DE102008037366A priority patent/DE102008037366A1/de
Priority to JP2008240174A priority patent/JP5706600B2/ja
Priority to CN200810149094.3A priority patent/CN101392752B/zh
Publication of US20090077795A1 publication Critical patent/US20090077795A1/en
Publication of US8142161B2 publication Critical patent/US8142161B2/en
Application granted granted Critical
Assigned to GE INFRASTRUCTURE TECHNOLOGY LLC reassignment GE INFRASTRUCTURE TECHNOLOGY LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GENERAL ELECTRIC COMPANY
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/322—Blade mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/326—Locking of axial insertion type blades by other means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • the present application relates generally to a replaceable staking insert for the retention of a wheel attachment and more particularly relates to a replaceable staking insert for a blade mounted on a compressor rotor or other type of rotating turbine component.
  • Gas turbine systems generally include a compressor rotor having a number of stages. Air flowing into the compressor is compressed at each stage. Each stage includes a number of rotor buckets or blades mounted to a rim of a rotor wheel or a disk in a spaced relationship. A typical compressor rotor may have dozens of rotor blades mounted thereon.
  • each blade may have a dovetailed portion that interlocks with a dovetail region of the rim to secure the blade to the rotor.
  • the blade dovetails may be secured to the rotor via a process called “staking”. Specifically, the rotor blade is placed within the rim slot and then “staked” into place by deforming the metal material around the blade dovetail with a tool similar to a nail punch. This process is then repeated for each rotor blade for each rotor assembly stage. Staking provides an economical and mechanically secured means of securing a blade or other attachment to the rotor or other type of wheel slot.
  • the rotor blades may be removed from the rotor wheel and the original “stakes” may be ground out. There are a finite number of attachments due to a limited number of viable staking locations about the rotor wheel. As such, the rotor wheel generally must be replaced once these staking locations have been consumed even if the rotor wheel is otherwise still in operational condition.
  • the present application thus describes a rotating assembly.
  • the rotating assembly may include a wheel, a slot positioned about the wheel with the slot having a staking recess positioned therein, a wheel attachment positioned within the slot, and a staking insert positioned within the staking recess.
  • the staking recess axially retains the staking insert and the wheel attachment radially retains the staking insert.
  • the application further describes a rotor assembly.
  • the rotor assembly may include a rotor, a number of axial slots positioned about a rim of the rotor with the axial slots each having one or more staking recesses positioned therein, a blade positioned within each of the axial slots, and a staking insert positioned within each of the staking recesses.
  • the application further describes a staking tool assembly for use about a wheel with rim having a number of axial slots.
  • the staking tool assembly may include a staking tool and a staking tool guide positioned axially about the rim and the axial slots of the wheel.
  • FIG. 1 is a perspective view of a blade being positioned within a rotor slot with a replaceable staking insert as is described herein.
  • FIG. 2 is a perspective view of the completed assembly of FIG. 1 .
  • FIG. 3 is a perspective view of a staking tool as may be used herein.
  • FIG. 4 is a perspective view of a staking tool assembly as is described herein.
  • FIG. 5 is a perspective view of an alternative embodiment of a staking tool assembly as is described herein.
  • FIG. 1 shows a portion of a rotor assembly 100 as is described herein.
  • the rotor assembly 100 includes a wheel or a rotor 105 .
  • a rim 110 of the rotor 105 may have a number of axial slots 120 formed therein.
  • the axial slots 120 may have a substantial dovetail-like shape with a base 130 , a pair of concave sidewall 140 , and an upper opening 150 . Other shapes may be used herein.
  • Each axial slot 120 also has a first end 160 and a second end 170 .
  • the rotor 105 may have any number of axial slots 120 positioned about the rim 110 .
  • Each end 160 , 170 of the axial slot 120 may have an insert recess 180 formed therein.
  • the insert recess 180 may include an insert base 190 that has a stepped down shape from the base 130 of the axial slot 120 .
  • the insert recess 180 also may have a pair of concave insert sidewalls 200 that define an axial opening 210 .
  • Other shapes may be used herein.
  • the shape and dimensions of the insert recess 180 may vary with the geometry of the axial slot 120 and the rotor assembly 100 as a whole.
  • the rotor assembly 100 also includes a number of rotor buckets or blades 220 . Any number of blades 220 may be used herein.
  • Each axial slot 120 may have a blade 220 mounted therein.
  • Each blade 220 may include a root 230 with an airfoil 240 extending therefrom.
  • the root 230 may have a substantial dovetail-like shape that conforms to the dovetail-like shape of the axial slot 120 .
  • the root 230 may include a base 250 and a pair of convex sidewall 260 .
  • the root 230 may extend the length of the axial slot 120 from the first end 160 to the second end 170 of the base 130 or the root 230 may extend for a portion of the length and one or more spacers (not shown) also may be used to fill the length of the axial slot 120 .
  • the rotor assembly 100 further may include a staking insert 270 .
  • the staking insert 270 may be inserted in each of the insert recesses 180 of the axial slots 120 .
  • the staking insert 270 may be sized to cooperate with the insert recess 180 and may have a staking insert base 280 and a pair of convex sidewalls 290 .
  • Other shapes may be used herein.
  • the staking insert 270 may be made out of alloy steel, nickel, or other types of substantially heat resistant and/or corrosion resistant materials.
  • the staking insert 270 may be axially retained within the sidewalls 200 of the insert recess 180 .
  • Other types of complementary shapes and retaining means may be used herein.
  • the staking inserts 270 may be inserted within the insert recesses 180 of the axial slots 120 .
  • Each axial slot 120 may have two (2) insert recesses 180 such that two (2) staking inserts 270 may be used for each blade 220 .
  • the staking insert 270 may be retained axially via the shape of the insert recess 180 .
  • a blade 220 then may be slid into each axial slot 120 .
  • the root 230 of the blade 220 retains the staking insert 270 radially.
  • the inserts 270 may be staked to retain axially the inserts 270 and the blades 220 to the rotor 105 .
  • two (2) staking indents 275 are formed therein.
  • the blades 220 are thus mechanically attached and secured within the axial slots 120 of the rotor 105 . Staking of the rotor 105 itself thus is not required.
  • a replacement staking insert 270 may be positioned within the insert recess 180 and restaked.
  • FIGS. 3-5 show an example of a staking tool assembly 300 and a staking tool 310 .
  • the staking tool 310 includes an elongated shank 320 with two staking cones 330 on one end thereof.
  • the staking cones 330 may be sized according to the size of the intended staking insert 270 .
  • Other configurations may be used herein.
  • the staking tool assembly 300 may include a staking tool guide 340 .
  • the staking tool guide 340 may include a staking tool aperture 350 that is sized according to the size of the staking tool 310 and the staking insert 270 .
  • the staking tool aperture 350 may be positioned within a member 360 .
  • the member 360 may be an elongated arm or other type of elongated member.
  • the member 360 may be positioned about the insert recess 180 on the axial side of the rim 110 of the rotor 105 .
  • the staking tool aperture 350 and the member 360 may be supported by a base 370 .
  • the base 370 may be sized so as to fit within an adjacent axial slot 120 . Once positioned therein, the base 370 may be secured by a number of pins or similar devices.
  • the member 360 may be maneuverable about the base 370 so as to provide proper positioning about the insert 270 .
  • the base 370 also may be used to position other types of equipment about the axial slot 120 or otherwise.
  • a drilling/milling apparatus may be mounted thereon to provide for machining of the axial slot 120 or otherwise.
  • multiple bases 370 may be used such that both adjoining axial slots 120 may be used.
  • Other types of equipment may be mounted herein.
  • FIG. 5 shows an alternative embodiment of a staking tool guide 400 .
  • the staking tool guide 400 includes the staking tool aperture 350 positioned within a member 360 or a similar type of structure.
  • the staking tool guide 400 includes a magnetic base 410 .
  • the magnetic base 410 may have a number of magnets 420 therein so as to attach the staking tool guide 400 about the insert 270 .
  • the staking tool guide 400 of this embodiment may be used on the last axial slot 120 of the rotor 105 once all of the blades 220 have been inserted therein such that the base 370 cannot be used.
  • the use of the staking tool guides 340 , 400 thus provide for the proper location of the staking tool 310 for controlled staking locations and consistently reproducible results.
  • the staking inserts 270 may be quickly inserted and staked for efficient construction or repair.
  • the present invention may be applicable to any type of rotating assembly.
  • Other potential applications include rotating buckets of gas turbines, rotating buckets/blades of steam turbines, or the retention of any device that is mechanically attached to a rotating wheel or disk with an axial slot or dovetail arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Compressor (AREA)
  • Manufacture Of Motors, Generators (AREA)
US11/858,186 2007-09-20 2007-09-20 Replaceable staking insert Active 2031-01-25 US8142161B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/858,186 US8142161B2 (en) 2007-09-20 2007-09-20 Replaceable staking insert
CH01472/08A CH697913B8 (de) 2007-09-20 2008-09-16 Rotoranordnung mit austauschbarem Stemmeinsatz.
DE102008037366A DE102008037366A1 (de) 2007-09-20 2008-09-16 Austauschbarer Verkerbungseinsatz
CN200810149094.3A CN101392752B (zh) 2007-09-20 2008-09-19 可更换的铆接插入件
JP2008240174A JP5706600B2 (ja) 2007-09-20 2008-09-19 交換可能なステーク挿入部

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/858,186 US8142161B2 (en) 2007-09-20 2007-09-20 Replaceable staking insert

Publications (2)

Publication Number Publication Date
US20090077795A1 US20090077795A1 (en) 2009-03-26
US8142161B2 true US8142161B2 (en) 2012-03-27

Family

ID=40384563

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/858,186 Active 2031-01-25 US8142161B2 (en) 2007-09-20 2007-09-20 Replaceable staking insert

Country Status (5)

Country Link
US (1) US8142161B2 (zh)
JP (1) JP5706600B2 (zh)
CN (1) CN101392752B (zh)
CH (1) CH697913B8 (zh)
DE (1) DE102008037366A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9145777B2 (en) 2012-07-24 2015-09-29 General Electric Company Article of manufacture
US9506357B1 (en) 2015-12-08 2016-11-29 General Electric Company Turbomachine staking tool
US10100677B2 (en) * 2016-09-27 2018-10-16 General Electric Company Fixture for restraining a turbine wheel
US20230035117A1 (en) * 2020-04-03 2023-02-02 Mitsubishi Heavy Industries, Ltd. Jig for assembling and extracting blade root spring, and method for assembling and extracting blade root spring

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120269592A1 (en) 2011-04-19 2012-10-25 James Bradford Holmes System and method for modifying a rotor
US8764402B2 (en) 2011-06-09 2014-07-01 General Electric Company Turbomachine blade locking system
US8992180B2 (en) 2011-08-24 2015-03-31 General Electric Company Replaceable staking insert assembly and method
US8402625B2 (en) 2011-08-30 2013-03-26 General Electric Company System and method for modifying a rotor
US9103221B2 (en) 2012-02-16 2015-08-11 Alstom Technology Ltd System and method for blade retention
US20140223709A1 (en) 2013-02-08 2014-08-14 General Electric Company Turbomachine rotor blade milling machine system and method of field repairing a turbomachine rotor blade
US9429041B2 (en) * 2014-05-14 2016-08-30 General Electric Company Turbomachine component displacement apparatus and method of use
US11098729B2 (en) * 2016-08-04 2021-08-24 General Electric Company Gas turbine wheel assembly, method of modifying a compressor wheel, and method of mounting a blade to a gas turbine wheel
US10843277B2 (en) 2017-01-16 2020-11-24 General Electric Company Portable jig and fixture for precision machining

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753149A (en) * 1951-03-30 1956-07-03 United Aircraft Corp Blade lock
JPS59113207A (ja) * 1982-12-20 1984-06-29 Mitsubishi Heavy Ind Ltd タ−ビンブレ−ドの抜け止め工法
US5727927A (en) * 1995-05-06 1998-03-17 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Device for securing rotor blades to a rotor, especially of a gas turbine propulsion plant
US5749706A (en) * 1996-01-31 1998-05-12 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Turbine blade wheel assembly with rotor blades fixed to the rotor wheel by rivets
US20020029653A1 (en) 1999-08-18 2002-03-14 General Electric Company Balance weight for a rotary component in turbomachinery, methods of installation and installation tools
US6390738B1 (en) * 2000-04-07 2002-05-21 Yevgeny Fridman Tool jig for doors
US20020085917A1 (en) * 2000-12-28 2002-07-04 Roberts Dennis William System and method for securing a radially inserted integral closure bucket to a turbine rotor wheel assembly having axially inserted buckets
US6582195B2 (en) 2001-06-27 2003-06-24 General Electric Company Compressor rotor blade spacer apparatus
US6837686B2 (en) * 2002-09-27 2005-01-04 Pratt & Whitney Canada Corp. Blade retention scheme using a retention tab

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2218872A1 (de) * 1972-04-19 1973-10-25 Bosch Gmbh Robert Radialkolbenmaschine
JPH11182494A (ja) * 1997-12-22 1999-07-06 Toshiba Corp 軸流圧縮機
CZ20002685A3 (cs) * 1999-12-20 2001-08-15 General Electric Company Zařízení pro uchycení lopatek otáčivého stroje a způsob jejich uchycení
US6832892B2 (en) * 2002-12-11 2004-12-21 General Electric Company Sealing of steam turbine bucket hook leakages using a braided rope seal
US6908285B2 (en) * 2003-04-08 2005-06-21 General Electric Company Methods and apparatus for assembling rotatable machines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753149A (en) * 1951-03-30 1956-07-03 United Aircraft Corp Blade lock
JPS59113207A (ja) * 1982-12-20 1984-06-29 Mitsubishi Heavy Ind Ltd タ−ビンブレ−ドの抜け止め工法
US5727927A (en) * 1995-05-06 1998-03-17 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Device for securing rotor blades to a rotor, especially of a gas turbine propulsion plant
US5749706A (en) * 1996-01-31 1998-05-12 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Turbine blade wheel assembly with rotor blades fixed to the rotor wheel by rivets
US20020029653A1 (en) 1999-08-18 2002-03-14 General Electric Company Balance weight for a rotary component in turbomachinery, methods of installation and installation tools
US6390738B1 (en) * 2000-04-07 2002-05-21 Yevgeny Fridman Tool jig for doors
US20020085917A1 (en) * 2000-12-28 2002-07-04 Roberts Dennis William System and method for securing a radially inserted integral closure bucket to a turbine rotor wheel assembly having axially inserted buckets
US6582195B2 (en) 2001-06-27 2003-06-24 General Electric Company Compressor rotor blade spacer apparatus
US6837686B2 (en) * 2002-09-27 2005-01-04 Pratt & Whitney Canada Corp. Blade retention scheme using a retention tab

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9145777B2 (en) 2012-07-24 2015-09-29 General Electric Company Article of manufacture
US9506357B1 (en) 2015-12-08 2016-11-29 General Electric Company Turbomachine staking tool
US10100677B2 (en) * 2016-09-27 2018-10-16 General Electric Company Fixture for restraining a turbine wheel
US20230035117A1 (en) * 2020-04-03 2023-02-02 Mitsubishi Heavy Industries, Ltd. Jig for assembling and extracting blade root spring, and method for assembling and extracting blade root spring
US11846205B2 (en) * 2020-04-03 2023-12-19 Mitsubishi Heavy Industries, Ltd. Jig for assembling and extracting blade root spring, and method for assembling and extracting blade root spring

Also Published As

Publication number Publication date
JP2009074551A (ja) 2009-04-09
CN101392752B (zh) 2013-05-22
US20090077795A1 (en) 2009-03-26
CN101392752A (zh) 2009-03-25
DE102008037366A1 (de) 2009-04-02
JP5706600B2 (ja) 2015-04-22
CH697913A2 (de) 2009-03-31
CH697913B8 (de) 2013-05-15
CH697913B1 (de) 2013-02-15

Similar Documents

Publication Publication Date Title
US8142161B2 (en) Replaceable staking insert
US8992180B2 (en) Replaceable staking insert assembly and method
US9328621B2 (en) Rotor blade assembly tool for gas turbine engine
JP5956737B2 (ja) 蒸気タービンにおける接線方向列に使用するクロージャバケット用のスイング軸方向挿入方式
CA2226167C (en) Apparatus and method for locking blades into a rotor
US6733237B2 (en) Method and apparatus for mounting stator blades in axial flow compressors
US20090110552A1 (en) Compressor stator vane repair with pin
US7448844B1 (en) Blisk having partially cut blade attachment
CN101438029B (zh) 用于减少叶片/盘应力的叶片/盘燕尾背切
EP2299059B1 (en) An aerofoil blade assembly
JP2004144092A (ja) 蒸気タービンの止めバケット取付け装置
US8720057B2 (en) Method for reconditioning a rotor of a turbomachine
US20060245923A1 (en) Arcuate nozzle segment and related method of manufacture
US6763560B2 (en) Spreader for separating turbine buckets on wheel
US7367778B2 (en) Rotor end piece
CN112313396B (zh) 用于拆卸叶片轮的保持系统
CN107687445B (zh) 叶轮组件、改变叶轮的方法和将叶片安装至叶轮的方法
US7677870B1 (en) Screw in blade/vane
US20170218782A1 (en) Modular turbine blade with separate platform support system

Legal Events

Date Code Title Description
AS Assignment

Owner name: GENERAL ELECTRIC COMPANY, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PRINCE, STEPHEN ROBERT;WASSYNGER, STEPHEN PAUL;TIPTON, THOMAS R.;AND OTHERS;REEL/FRAME:019852/0318;SIGNING DATES FROM 20070906 TO 20070908

Owner name: GENERAL ELECTRIC COMPANY, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PRINCE, STEPHEN ROBERT;WASSYNGER, STEPHEN PAUL;TIPTON, THOMAS R.;AND OTHERS;SIGNING DATES FROM 20070906 TO 20070908;REEL/FRAME:019852/0318

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12

AS Assignment

Owner name: GE INFRASTRUCTURE TECHNOLOGY LLC, SOUTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GENERAL ELECTRIC COMPANY;REEL/FRAME:065727/0001

Effective date: 20231110